Rock candy is formed when excess sugar is dissolved in hot water followed by crystallization. a student wants to make two batches of rock candy. he finds an unopened box of "cane sugar" in the pantry. he starts preparing batch a by dissolving sugar in of hot water he keeps adding sugar until no more sugar dissolves in the hot water. he cools the solution to room temperature. he prepares batch b by dissolving sugar in of water at room temperature until no more sugar is dissolved. he lets the solution sit at room temperature.